Operating System

Operating System:

An operating system is software (all programs) background which provides communication between the processor and the user devices. It is the first program that can hold a computer. It manages the hardware and other software.

Examples: MS-DOS, Windows (95, 98,2000, XP, Vista ...), UNIX, LINUX ....

- The various types of operating systems:

The operating system most used today is Windows. But there are others such as MSDOS, Linux, Unix, ....

We can classify the operating systems into two main groups according to their modes of communication with the user:

· Operating systems work in text mode as MS DOS.

· Operating systems work in graphical mode as Windows and Linux.

- Basic Functionality of an operating system:

•      allows the computer to start and establish communication with the user.
•      is responsible for establishing communication between the hardware and programs.
•      connects the various devices connected to the computer.
•      helps organize records and files it contains.
•      supports reading / writing data to the disk or in memory.
•      displays information on the screen, interprets the keystrokes typed.
• Etc. ....

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Source : http://tanawiati.net/logiciel.htm